Bring thyself to account each day ere thou art summoned to a reckoning — Bahá’u’lláh
O Son of Being! Bring thyself to account each day ere thou art summoned to a reckoning; for death, unheralded, shall come upon thee and thou shalt be called to give account for thy deeds.

Bahá’u’lláh

The Hidden Words, Part One (Arabic), No. 31

Bahá’í Reference Library