There are two stages in life when one needs to be very careful.
Just like a tree is quite vulnerable when it’s very young, and when it grows extremely tall; in either case it can be uprooted easily.
Similarly, both the stages are quite vulnerable in spirituality also. In the beginning, one may find this path quite difficult or boring and quit. Some people might easily get influenced by others and become confused.
And secondly, when we become over-confidant and start thinking that we know everything and become egotistic.
In both the situations, we may get deviated from the right path and fail to achieve the desired goal.