If you learn a little, know a little, and do a little,
since doubts arise and there is no possibility, you will lack confidence, so you will be less likely to take action.
When you learn a lot, know a lot and do a lot
and thus accumulate a lot of things in your head,
your brain gets completely filled and your mind becomes strong also.
Therefore, doubts will vanish and possibility will increase,
so you will do even more with confidence.
When you do a little, you do not have confidence in that matter and there is no possibility. Hence, you will not take action.
Those who do little fail and those who do a lot succeed.