The fifth act of faith.

Herman witsius has written:

“This hunger and thirst are followed by a receiving of Christ the Lord for justification, sanctification, and so for complete salvation: which is the fifth, and indeed the formal and principal act of faith. Thus the heavenly Father freely offers his Son to the sick and weary soul; and Christ the Lord offers himself with all his benefits, and the fullness of salvation which is in him, saying, behold me, behold me, Isa. lxv. 1. And the soul now conscious of its own misery, and with joy and hope observing the fullness of salvation that is in Christ, and earnestly desiring communion with him, cannot but lay hold on and receive, with the highest complacency of soul, that extraordinary blessing thus offered, and thus by receiving, appropriate or make it his own. And by this act, at length Christ becomes the peculiar property of the believing soul. Thus it lays claim to whatsoever is Christ’s, which is offered at the same time with Christ, and above all the righteousness of Christ, which is the foundation of salvation. And in this manner, by apprehending Christ, he is united to him; and being united to him, he is judged to have done and suffered what Christ, as his Surety, did and suffered in his room and stead. And thus it is easy to understand how we are justified by faith on Christ.” …

(Witsius, Herman. The Economy of the Covenants Between God and Man, Volume I, Kingsburg, CA: den Dulk Christian Foundation, 1990, p. 382)