Boldness is a mask for fear, however great.

Bold knaves thrive without one grain of sense,
But good men starve for want of impudence.

What God says is best, indeed is best, though all men in the world are against it. Seeing, then, that God prefers his religion; seeing God prefers a tender conscience; seeing they that make themselves fools for the kingdom of heaven are wisest; and that the poor man that loveth Christ is richer than the greatest man in the world that hates him: Shame, depart, thou art an enemy to my salvation.

Fortune favors the bold, but abandons the timid.

A man's wisdom maketh his face to shine, and the boldness of his face shall be changed

In great straits and when hope is small, the boldest counsels are the safest.