the most talented in a skill or art will prectise it, so the task of instruction is left to the less talented

Those who can, do. Those who cannot, teach. Those who cannot teach, HACK! To be, or not to be, those are the parameters. google

Of course, Shaw was also the man who coined the immortal line, "Those who can, do;
those who cannot, teach". google

"Those who can, do; those who cannot, teach.". —Not many. —Those who can, do; those who can't, bully.  Google

become very confused when sb tries to explain sth

I tied myself in knots in the days before that meeting. Google

Trying to work out the bandwidth I need - and where, I've tied
myself in knots trying to visualize what's travelling where. google

I've tied myself in knots trying rationalise the use of 'Duel of the Fates' and the
'Emperors Theme'. google

too; excessively/honest, tidy, frank, obliging

 But if so, he is generous to a fault. Google

"John is neat to a fault".  Google

Krall show is eclectic to a fault. google

it is the nature of mankind to sin and to make mistakes

To Err Is Human breaks the silence that has surrounded medical errors and their consequence--but not by pointing fingers at caring health care professionals who make honest mistakes.  WebC

Remember, to err is human, to forgive is divine. Webc

Finally, we need to realize that, as the IOM report states, "to err is human."  WebC

according to what one knows

Socrates brings forward the god of Delphi as a witness to his knowledge. Google

Senor said that to his knowledge Berg "was at no time under
the jurisdiction or detention of coalition forces.".  Google

His shoeing customers and students will witness to his knowledge and ability
with a horse involving training , shoeing and lameness work. Google

dostat (jedničku) za snahu

He admitted that several initiativesshould receive A for effort even though they did not end in success. (Google)

If travel retail websites were to be given report cards, Cochin Duty Free would receive an A for effort, though it still has some work to do on. (Google)

Since I audited the class, I was not too concerned about the grade, but did receive an A (for effort, I'm sure) and increased my comfort level in speaking. (Google)

škola života

Abbey Academy of Arts is like the university of life; where one learns from life's experience. (Google) 

I learned all I need to know from the university of life, not from books.(thefreedictionary.com)

My journey to america was a real university of life. (Google)

(být v něčem) až po uši, (mít něčeho) po krk

Right now I’m up to my eyes in work.  google

Normally I'm up to my eyes in the kitchen but because I've
been on a diet I really find time hangs heavily on my hands. Google

As it is, I'm up to my eyes in writing,
and it's all piling up to be polished and sent. 2 am.  Google

not be self-imporatnt about one´s knowledge, not try impress others

Colleagues also mention his kindness and patience: he
wears his learning lightly, with no hint of arrogance. Google

By any standard, 50 pages of footnotes
impress, though he wears his learning lightly. Google

 He wears his learning lightly, but the book is
peppered with interesting allusions and references.  google

quickness of mind and sagacity

There is wit and wisdom for caregivers in these uplifting reflections, especially
for those caring for the terminally ill.  Google

"That which does not kill us makes us stranger": the collected wit
and wisdom of spammers. Google

These bits of wit and wisdom are from Reader's
Digest and other places.  Google

seems likely to be true

Cliches though they may be, statements that can summarize a situation so completely
that every fiber resonates with the ring of truth are powerful.  Google

The result is a work with the ring of truth, peopled with characters who
come alive from the page.  Google

The fellowship gave me the freedom, time, and knowledge
needed in order to imbue my novel with the ring of truth. Google

to be acting as you do when you are working as a teacher, lawyer etc., which may be different from the way you act in other situations 

I'd like to talk to you with your lawyer's hat on. WebC

May I ask you with your lawyer's hat on, do you see as a result of a piece of legislation like this there will be more legal action, more judicial review?  Google

doslovný/doslovně, slovo od slova

Much of his material was plagiarized -- lifted word-for-word from a paid news service put out by Austin, Texas. google

Is Christianity a “word-for-word” Calling? Google

The book follows, almost word for word, the 4th edition of Bewick's Quadrupeds. Google

able to repeat a passage of verse or prose without mistakes or hesitations

They are expected to come word perfect and to research their part, however tiny.  google

Nicholson saw them around Sunset Strip and for a time they were joined by Elvis Presley, who had seen Rebel Without a Cause forty-four times and could speak Dean's lines word perfect.  google

`;Your German was word perfect when we spoke earlier, Mr Whitlock,'; Franz said.  google

wise or sensible remarks, advice

Quotations and words of wisdom from people who not only knew what they were saying
but who also knew how to say it well.  google

Ben Franklin wrote many words of wisdom.  google

A collection of words of wisdom springed from a vast cultural heritage of mankind.
 google