...the grace of the Spirit takes possession of the quiet soul, and gives it a taste of the unspeakable good things to come, which no passionate and negligent eye has seen, nor ear heard, neither have entered into the heart of such a man (cf. I Cor. 2:9). This taste is the earnest of these good things, and the heart which accepts these pledges becomes spiritual and receives assurance of its salvation.
Gregory PalamasMore Gregory Palamas quotes
Let no one out of laziness or continuous worldly occupations miss these holy Sunday gatherings, which God Himself handed down to us, lest he be justly abandoned by God... If you are detained and do not attend on one occasion, make up for it the next time, bringing yourself to Christ's Church. Otherwise you may remain uncured, suffering from unbelief in your soul because of deeds or words, and failing to approach Christ's surgery to receive... holy healing.
Gregory Palamas