What Chinese idiom or proverb including the characters 行 and 易 roughly translates to When someone acquires the discipline of learning then doing the work comes easily?

Answer 1

The following 4-character Chinese proverbs deal with a somewhat similar topic, though none fits your definition exactly:

• 革心易行 gé xīn yì xíng --> roughly means change the wrong way of thinking, and change the wrong way of working

• 行易知难 xíng yì zhī nán --> roughly means it is easy to implement, but harder to understand the theory/rationale/principles behind

• 知易行难 zhī yì xíng nán --> roughly means it is easy to understand, but difficult to implement/put into action

Answer 2

This idiom is "学而时习之，不亦说乎" (xué ér shí xí zhī, bù yì yuè hū) which translates to "Is it not a joy to have friends coming from afar who quietly approach us closely and without words."