11 These things therefore, all of them, remember with exactness in order that you may be able with all wisdom to correct those who use the Scriptures without reference to circumstances and at hap-hazard, and for the destruction of their neighbours. And we shall be able both to remember what has been said, and to correct others, if we always betake ourselves to prayers as a refuge, and beseech the God who gives the word of wisdom to grant both intelligence in hearing, and a careful and unconquerable guardianship of this spiritual deposit in our hands.
For things which often we have not strength to perform successfully from our own exertions, these we shall have power to accomplish easily through prayers which are persevering. For always and without intermission it is a duty to pray, both for him who is in affliction, and him who is in dangers, and him who is in prosperity— for him who is in relief and much prosperity, that these may remain unmoved and without vicissitude, and may never change; and for him who is in affliction and his many dangers, that he may see some favourable change brought about to him, and be transported into a calm of consolation.
Are you in a calm? Then beseech God that this calm may continue settled to you. Have you seen a storm risen up against you? Beseech God earnestly to cause the billow to pass, and to make a calm out of the storm. Have you been heard? Be heartily thankful for this; because you have been heard. Have you not been heard? Persevere, in order that you may be heard. For even if God at any time delay the giving, it is not in hatred and aversion; but from the desire by the deferring of the giving perpetually to retain you with himself; just in the way also that affectionate fathers do; for they also adroitly manage the perpetual and assiduous attendance of children who are rather indolent by the delay of the giving.
There is to you no need of mediators in audience with God; nor of that much canvassing; nor of the fawning upon others; but even if you be destitute, even if bereft of advocacy, alone, by yourself, having called on God for help, you will in any case succeed. He is not so wont to assent when entreated by others on our behalf, as by ourselves who are in need; even if we be laden with ten thousand evil deeds. For if in the case of men, even if we have come into countless collisions with them, when both at dawn and at mid-day and in the evening we show ourselves to those who are aggrieved against us, by the unbroken continuance and the persistent meeting and interview we easily demolish their enmity— far more in the case of God would this be effected.
Source: Homily Concerning "Lowliness of Mind" (New Advent)