Words from Srila Bhaktivinode Thakura:

Give up the shackles of matter slowly. Cultivate your spirit inwardly. Give up prejudices which you have acquired from the so-called rational thinkers who deny the existence of spirit.

Be humble in yourself and learn to respect those who work towards spiritual attainments. Do these with your heart, mind and strength in the company of spiritual people alone and you will see Krishna in no time.

Krishna is not an imaginary Being, nor have you a right to think that He is a material phenomenon, fancied to be the Supreme Being by the fools. Krishna is not understood by the process of distinguishing the subjective from the objective, nor He is to be accepted as an imposition on the people set up by designing men.

Krishna is eternal, spiritually true, reflected on the human soul when relieved of all pressure of gross matter, and is the subject of love which proceeds from the soul. Accept Him as such and you will see Him in your soul’s eye. Words fail to describe that Transcendental Being.

The highest, best and most spiritual ideal of the Divinity is in Krishna. To bring arguments against Him is simply to deceive one’s self and deprive himself of the blessings that God has kept in store for man. Hence, all descriptions of His Name, Person, Attributes and Lila should be accepted spiritually, giving up the material portion which words must necessarily convey.

From: Sri Caitanya–His Life and Precepts