Robert Traill (Stedfast Adherence to the Profession of our Faith), Works 3:144-145:
There have been believers that have had heaven upon earth in this world, but when they came to enjoy heaven in heaven, they doubtless found a vast difference. At that day, says our Lord, ye shall know, that I am in my Father, and ye in me, and I in you, John 14:20. You shall know it in a better manner than now you can imagine. All the enjoyments that God affords unto his people here, are all helps whereby believers may come to know and guess better what heaven is. They should not say, It is good to be here because of these; but he is good that gives that good here, and there are better things prepared that we should desire the more fervently. All spiritual enjoyments that are given in time are for the sharpening the believer’s appetite, and raising their spirits in desire of heaven the more fervently.