Holiness comes from love…

You must be most loyal to our Lord Jesus Christ by giving Him the glory for any virtues you possess. You must also love Him fervently, if you would be perfect, for holiness comes from love, and the greater the love, the greater the saint. The best proof we can give of our love for Christ is to obey His commands and bear the cross for Him; the greater the mortifications and hardships this entails, the more does a bear witness to the genuineness of our love.
— Saint John of Avila (1500 – 1569)