This text, since it is a commandment, implies that obedience to it, and therefore the realisation of this continual festal aspect of life, is very largely in our own power.  Dispositions differ, some of us are constitutionally inclined to look at the blacker, and some at the brighter, side of our experiences.  But our Christianity is worth little unless it can modify, and to some extent change, our natural tendencies.  The joy of the Lord being our strength, the cultivation of joy in the Lord is largely our duty.  Christian people do not sufficiently recognise that it is as incumbent on them to seek after this continual fountain of calm and heavenly joy flowing through their lives, as it is to cultivate some of the more recognised virtues and graces of Christian conduct and character.

Secondly, we have here—­

II.  The Christian life is a continual feeding on a sacrifice.

’Christ our Passover is sacrificed for us.  Wherefore let us keep the feast.’  It is very remarkable that this is the only place in Paul’s writings where he articulately pronounces that the Paschal Lamb is a type of Jesus Christ.  There is only one other instance in the New Testament where that is stated with equal clearness and emphasis, and that is in John’s account of the Crucifixion, where he recognises the fact that Christ died with limbs unbroken, as being a fulfilment, in the New Testament sense of that word, of what was enjoined in regard to the antitype, ‘a bone of him shall not be broken.’

But whilst the definite statement which precedes my text that Christ is ‘our Passover,’ and ‘sacrificed for us’ as such, is unique in Paul’s writings, the thought to which it gives clear and crystallised expression runs through the whole of the New Testament.  It underlies the Lord’s Supper.  Did you ever think of how great was the self-assertion of Jesus Christ when He laid His hand on that sacredest of Jewish rites, which had been established, as the words of the institution of it say, to be ’a perpetual memorial through all generations,’ brushed it on one side, and in effect, said:  ’You do not need to remember the Passover any more.  I am the true Paschal Lamb, whose blood sprinkled on the doorposts averts the sword of the destroying Angel, whose flesh, partaken of, gives immortal life.  Remember Me, and this do in remembrance of Me.’  The Lord’s Supper witnesses that Jesus thought Himself to be what Paul tells the Corinthians that He is, even our Passover, sacrificed for us.  But the point to be observed is this, that just as in that ancient ritual, the lamb slain became the food of the Israelites, so with us the Christ who has died is to be the sustenance of our souls, and of our Christian life.  ‘Therefore let us keep the feast.’