Everyone should carefully observe which way his heart draws him, and then choose that way with all his strength

Similar sayings:

Men know not all their faults, oxen all their strength Men know not all their faults, oxen all their strength
The best cure for drunkenness is whilst sober to observe a drunken person The best cure for drunkenness is whilst sober to observe a drunken person
One should be just as careful in choosing one’s pleasures as in avoiding calamities One should be just as careful in choosing one’s pleasures as in avoiding calamities
You cannot draw white cloth from a dying vat You cannot draw white cloth from a dying vat
Add legs to the snake after you have finished drawing it Add legs to the snake after you have finished drawing it

Chinese sayings and proverbs