Upon opening the Irshad for the first time, I ran into this excerpt on purification of the Self before prayer.
“External ablution is purification from physical defilement. It is good order and rectitude. Inner cleanliness, however, means purifying the heart of vanity, arrogance, hypocrisy, envy, irascibility, worldly ambition, greed and lust, as well as unlawful appetites, thoughts and words. It means not letting into the heart anything other than love of God and the Messenger. If you possess this fine character, you need fear no punishment from Allah.”
— p. 172, Sheikh Efendi (رحمت الله عليه), Irshad