The internal call is when the Spirit of God accompanies the outward administration of the Word to call a man from ignorance to knowledge, and a state of nature to a state of grace.

If the elect could perish, then Jesus Christ should be very unfaithful to his father, because God the father hath given this charge to Christ, that whomsoever he elected, Christ should preserve them safe, to bring them to heaven. Now should not this be accomplished, Christ would be unfaithful to his father. John 6.39.

Blessed be God that Thou hast filled the soul of Thy servant with joy and peace in believing.

Most Glorious and eternal Majesty, Thou art righteous and holy in all thou dost to the sons of men, though thou hast suffered men to condemn Thy servant, Thy servant will not condemn Thee.

First, draw off your hearts, because Jesus Christ, the Head, is risen and ascended upon high, and there sits at the right hand of His Father; and if the Head is in heaven, where should the members be but where the Head is? Shall Christ our Head be in heaven, and shall our hearts, which are His members, lie groveling on the ground and panting after the dust of the earth, making all our inquiry and labor after these? 'If Christ our Head be risen, seek those things that are above, where Christ sits at God's right hand.'

The internal call is when the Spirit of God accompanies the outward administration of the Word to call a man from ignorance to knowledge, and a state of nature to a state of grace.

Grace is the understanding that God is a better savior than you are a sinner.