Theologians enumerate eight signs of predestination.
First, a good life;
secondly, the testimony of a good conscience;
thirdly, patience in adversities for love of God;
fourthly, relish for the light and the word of God;
fifthly, mercy toward those who suffer;
sixthly, love of enemies;
seventhly, humility;
eighthly, special devotion to the Blessed Virgin.
--Reginald Garrigou-Lagrange, Life Everlasting