February 17

With regard to your spiritual experiences, the Guardian has been very interested to share them. He would, however, urge you to always use and read, during your hours of meditation and prayer, the words revealed by Bahá'u'lláh and the Master. 
(From a letter dated 6 December 1935 written on behalf of Shoghi Effendi to an individual believer; The Compilation of Compilations, Vol. II, The Importance of Prayer, Meditation and the Devotional Attitude)