Self-reliance is critical to success on any spiritual path, not to mention in other aspects of life. Here are some verses from the YV on the value of self-effort:
"II 4 O Rama, listen to what I [Vasishtha] am about to say, which instruction is sure to remove the darkness of ignorance. A well-sustained self-effort leads to success in every field of life. Wherever one encounters failure, it is due to lack of self-effort.
Liberation produces selflessness; we lose our selfishness when we come to know the unity of the soul. By effort one can attain knowledge which leads to salvation. This is obvious; but what is called God, destiny or fate is fictitious and is not seen. The dull and the ignorant created God, which is none other than self-effort of a past incarnation affecting one.
Self-effort, Rama, is that mental, verbal and physical action which is in accordance with the instructions of a holy person well versed in the scriptures. This will reveal the moon of spiritual bliss beyond the dark clouds of mental impurities. Such effort, continuous and constant, gives good results, all the rest is sheer madness. The goal of self-effort is Self-realization.
It is only by such effort that Indra became king of heaven, that Brahma became the creator, and Vishnu and Shiva earned their place. When right self-effort is sustained, one rises to that lofty state wherein ruling the vast earth is known as insignificant compared to the glory of Self-realization.
II 5 Self-effort is of two categories: that of past births and that of this present birth. Past efforts can be counteracted by current labors. There is constant conflict, like battling rams, between these two in this incarnation. That which is more powerful triumphs. Men of self-effort, by firm and long practice, can undo the past effort.
Self-effort which is not in accord with the scriptures is motivated by delusion. To go against scriptural injunctions will lead to disasters. Mental desire alone, without the needed action, is pure lunacy. It will not only be useless, but it will lead to further delusions.
There is no power greater than right action in the present. Hence, one should take recourse to self-effort, gritting one's teeth, and one should overcome evil by good and destiny by present effort. Even obstructions presented by the devas are due to bad actions in past lives.
One’s effort must be maintained until the past negative karma is overpowered. The virtues of this life are bound to overcome the vices of past lives. Therefore, one must cultivate serenity, self-control, reflection and meditation by his self-effort."