The qalb saleem, the sound or whole heart, is named by the Qur’an as the one thing that will truly avail a person on the Day when wealth and children will not: except he who comes to God with a sound heart (26:88-89).

In the tradition

The sound heart is one free of the diseases that corrupt it, arrogance, envy, rancour, hypocrisy, and whole in its sincerity toward God. It is the destination of the entire journey of tazkiyah, the refined end-point of all the inner work.

The modern parallel

Psychology speaks of integration and wholeness: a self that is regulated rather than reactive, compassionate rather than self-attacking, aligned with its own values rather than at war with itself. The opposite is a heart hardened and fragmented by unprocessed pain. The qalb saleem is, in this sense, a picture of full psychological and spiritual health at once.

Why it matters

The sound heart unifies everything else in this encyclopedia. Every concept here, from regulating the nafs to softening through dhikr, is ultimately in service of one aim: a heart that is whole, at peace, and sound.

Part of the Mentscape encyclopedia of Islamic psychology. Educational writing, not personal clinical advice.