William Burkitt on Hebrews 6:1

In these words of the apostle, he seems to allude to the building of an house: as in that we first lay a good and sure foundation, but do not rest there, but proceed in raising up the fabric; in like manner, it is neither satisfactory nor sufficient to advance no further in the Christian religion, than the knowledge of the first principles of it; but endeavours must be used to attain a more perfect degree and measure of knowledge in the mysteries of the gospel. Leaving the principles of the doctrine of Christ, he means not leaving them by going beyond them and advancing further and higher in the knowledge of Christianity.

Learn hence, 1. That in Christianity, and other sciences, there are certain rudiments and fundamental principles, which must and ought to be carefully taught.

2. That it is a necessary and useful practice, in the church of God, to teach the doctrine of Christianity, in the first principles of it, plainly and summarily to young beginners.

Learn, 3. That when the ministers of the gospel have laid a good foundation of Scripture knowledge in the understanding of their hearers, they must excite them by all pressing considerations to make a further progress in their knowledge, and leaving the doctrine of the beginning of Christ, go on unto perfection.