Institutes 4.14.8 — OF THE SACRAMENTS.
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**OF THE SACRAMENTS.**
But Philip, they say, replied to the eunuch who asked to be baptized, “If thou believest with all thine heart thou mayest” ( Acts 8:37 ). What room is there for a confirmation of baptism when faith fills the whole heart? I, in my turn, ask them, Do they not feel that a good part of their heart is void of faith—do they not perceive new additions to it every day? There was one who boasted that he grew old while learning. Thrice miserable, then, are we Christians if we grow old without making progress, we whose faith ought to advance through every period of life until it grow up into a perfect man ( Eph. 4:13 ). In this passage, therefore, to believe with the whole heart , is not to believe Christ perfectly, but only to embrace him sincerely with heart and soul; not to be filled with him, but with ardent affection to hunger and thirst, and sigh after him. It is usual in Scripture to say that a thing is done with the whole heart, when it is done sincerely and cordially. Of this description are the following passages:—“With my whole heart have I sought thee” ( Ps. 119:10 ); “I will confess unto thee with my whole heart,” &c. In like manner, when the fraudulent and deceitful are rebuked, it is said “with flattering lips, and with a double heart, do they speak” ( Ps. 12:2 ). The objectors next add—“If faith is increased by means of the sacraments, the Holy Spirit is given in vain, seeing it is his office to begin, sustain, and consummate our faith.” I admit, indeed, that faith is the proper and entire work of the Holy Spirit, enlightened by whom we recognise God and the treasures of his grace, and without whose illumination our mind is so blind that it can see nothing, so stupid that it has no relish for spiritual things. But for the one Divine blessing which they proclaim we count three. For, first, the Lord teaches and trains us by his word; next, he confirms us by his sacraments; lastly, he illumines our mind by the light of his Holy Spirit, and opens up an entrance into our hearts for his word and sacraments, which would otherwise only strike our ears, and fall upon our sight, but by no means affect us inwardly.
Source
source-manifest/institutes— Calvin, Institutes of the Christian Religion, tr. Beveridge 1845 (PD)- evidence_grade: D_doctrinal_textbook