Perfect Faith In Oneself

One must have perfect in G-d -- believing that He is the Creator of everything, that He controls and supervises everything, and that He has the power to change the course of events any way He wishes and bless us with everything good.

And just as one must have perfect faith in G-d, so too must one have perfect faith in oneself. One must have perfect faith that G-d listens and attends to every single word spoken by every single Jew, even the lowest of the low. Every single Jew has the power to accomplish what he needs through praying to G-d truly and sincerely, as it is written, "G-d is close to all who call him".

(Likutey Halachos, Nachalos 4:3)