Inner culture is essential. It is the path of soul culture. Discipline your life. Bring more love and devotion into your heart.
Heart is the place of emotion, ego, and attachment. You have to rise above all the propensities of the heart. Clean it thoroughly, surrendering it to God through regular prayer and meditation, and through sincere and steadfast effort.
A spiritual person's heart is full of divine love.
Purify the heart through deep meditation.
Scrutinizingly observe the waves in the heart.
A spiritual person should have thorough control over the heart propensities.