And call upon me in the day of trouble: I will deliver you, and you shall glorify me.
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Augustine of Hippo
22. "And call thou upon Me in the day of thy tribulation: and I will draw thee forth, and thou shall glorify Me" (ver. 15). For thou oughtest not to rely on thy powers, all thy aids are deceitful. "Upon Me call thou in the day of tribulation: I will draw thee forth, and thou shalt glorify Me." For to this end I have allowed the day of tribulation to come to thee: because perchance if thou wast not troubled, thou wouldest not call on Me: but when thou art troubled, thou callest on Me; when thou callest upon Me, I will draw thee forth; when I shah draw thee forth, thou shalt glorify Me, that thou mayest no more depart from Me. A certain man had grown dull and cold in fervour of prayer, and said, "Tribulation and grief I found, and on the Name of the Lord I called." He found tribulation as it were some profitable thing; he had rotted in the slough of his sins; now he had continued without feeling, he found tribulation to be a sort of caustic and cutting. "I found," he saith, "tribulation ...
Call. Prayer is a perfect act of religion, and a confession of God's dominion. Qui fingit sacros auro vel mar more vultus, Non facit ille Deos: qui rogat, ille facit. (Martial viii. v. 24.) To neglect prayer is, in some sense, to deny God. (Calmet)
He is pleased to exercise our confidence, (Haydock) and will have us to call upon him in distress. (Menochius)