If I were travelling with two partners, one virtuous and one dishonest, both would be useful as teachers. I would perceive what's good of the first one and I would imitate him whereas I would try to correct in me the defects I may see in the second one.
Do not wish for quick results, nor look for small advantages. If you seek quick results, you will not reach the ultimate goal. If you are led astray by small advantages, you will never accomplish great things.
There may be men who act without understanding why. I do not. To listen much, pick out the good and follow it; to see much and ponder it: this comes next to understanding.