... we can see both that love for God is begotten from the virtues and that virtues are born of love. For this reason the Lord said at one point in the Gospels, 'He who has My commandments and keeps them is the one who loves Me' (Jn. 14:21), and at another point, 'He who loves Me will keep My commandments' (cf. Jn. 14:23).
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