"Bhikkhus, these are three growths. Which three?

The growth of confidence (faith),

the growth of virtue,

the growth of wisdom.

These, indeed, bhikkhus, are the three growths."

Here, the growth of confidence comes from having an inquisitive mind - to inquire into the teachings with close examination and independent verification by applying the teachings into one’s practice to observe for the benefits to the condition of the mind, without building any beliefs.

Related Teachings:

7 kinds of wealth (AN 7.6) - The Buddha frames the seven constituents of true wealth

One Might Wish | achievements in spiritual life (MN 6) - The Buddha shares observance of ethical precepts as the foundation for all the higher achievements in the spiritual life.

Importance of cultivating wisdom (AN 76 - 81) - A series of short teachings of the Buddha highlighting the importance of cultivation of wisdom.