Srimad Bhagavatam

References to text SB 1.5.17
SB 1.5.17: One who has forsaken his material occupations to engage in the devotional service of the Lord may sometimes fall down while in an immature stage, yet there is no danger of his being unsuccessful. On the other hand, a nondevotee, though fully engaged in occupational duties, does not gain anything.

Text
In this endeavor there is no loss or diminution, and a little advancement on this path can protect one from the most dangerous type of fear.
Contents of the Gita Summarized
BG 2.40
Everyone is forced to act helplessly according to the qualities he has acquired from the modes of material nature; therefore no one can refrain from doing something, not even for a moment.
Karma-yoga
BG 3.5
The Supreme Personality of Godhead said: Son of Pṛthā, a transcendentalist engaged in auspicious activities does not meet with destruction either in this world or in the spiritual world; one who does good, My friend, is never overcome by evil.
Dhyana-yoga
BG 6.40