We see how much more abundantly he advanced his kingdom, how much greater power he displayed both in helping his people and in scattering his enemies. Carried up to heaven, therefore, he withdrew his bodily presence from our sight ( Acts 1:9 ), not to cease to be present with believers still on their earthly pilgrimage, but to rule heaven and earth with a more immediate power. But by his ascension he fulfilled what he had promised: that he would be with us even to the end of the world. As his body was raised up above all the heavens, so his power and energy were diffused and spread beyond all the bounds of heaven and earth.
The Institutes of the Christian Religion (Louisville, Kentucky; Westminster John Knox Press; 1974) 2.16.14.