“Recite ye the verses of God every morn and eventide.” (Bahá’u’lláh, ‘The Kitáb-i-Aqdas’)

April 6

O ye the dawning-places of knowledge! Beware that ye suffer not yourselves to become changed, for as ye change, most men will, likewise, change. This, verily, is an injustice unto yourselves and unto others. Unto this beareth witness every man of discernment and insight. Ye are even as a spring. If it be changed, so will the streams that branch out from it be changed.  Fear God, and be numbered with the godly. In like manner, if the heart of man be corrupted, his limbs will also be corrupted. And similarly, if the root of a tree be corrupted, its branches, and its offshoots, and its leaves, and its fruits, will be corrupted. Thus have We set forth similitudes for your instruction, that perchance ye may not be debarred by the things ye possess from attaining unto that which hath been destined for you by Him Who is the All-Glorious, the Most Bountiful. 
(Baha'u'llah, ‘Suriy-i-Haykal, ‘The Summons of the Lord of Hosts’)