How harmful is the praise of man! Even though a person may have done something worthy of praise, when he enjoys the sound of praise he is already deprived of future glory, according to teachings of the holy fathers.
This day the earth became Heaven for us. Not because the stars descended from the heavens to earth, but because the apostles ascended to Heaven by the grace of the Holy Spirit, which was now abundantly poured forth, and so the whole world was transformed into heaven; not because human nature was changed, but because there was a change in the direction of the will. For there was found a tax-gatherer, and he was transformed into an evangelist. There was found a persecutor, and he was changed into an apostle. There was found a robber, and he was led into Paradise. There was found a prostitute, and she was made the equal of virgins. There were found wise men, and they were taught the Gospels. Evil fled away, and gentleness took its place. Slavery was put away, and freedom came in its stead. And all debts were forgiven, and the grace of God was conferred. Therefore Heaven became earth.
Our enemies (demons) fell because of their pride, and call us to follow them, and bring us feelings of praise. And if your soul accepts that praise, then grace will depart, until the soul becomes humble again. And so all your life you must learn the humility of Christ.
The closet of the soul is the body; our doors are the five bodily senses. The soul enters its closet when the mind does not wander hither and thither, roaming among things and affairs of the world, but stays within, in our heart. Our senses become closed and remain closed when we do not let them be attached to external sensory things, and in this way our mind remains free from every worldly attachment, and by secret mental prayer unites with God its Father. 'And thy Father which seeth in secret shall reward thee openly,' adds the Lord. God who knows all secret things sees mental prayer and rewards it openly with great gifts. For that prayer is true and perfect which fills the soul with Divine grace and spiritual gifts.
A treasure that is known is quickly spent: and even so any virtue that is commented on and made a public show of is destroyed. Even as wax is melted before the face of fire, so is the soul enfeebled by praise, and loses the toughness of its virtue.