Hebrews 2:1 — Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip.

This verse speaks very directly to one of the things that I am most wary of about my own faith. I need to keep careful watch on myself. I need to make sure that I don’t drift away from my faith.
Alexander MacLaren explains that “drifting” is a more accurate picture of what the Greek word “pararreo” conveys than “let them slip”.

‘Drifting’ is the thing to be afraid of. Just as some boat, not made fast to the bank, certainly glides down stream so quietly and with so little friction that her passengers do not know that they are moving until they come up on deck, and see new fields around them, so the ‘things which we have heard,’ and to which we ought to be moored or anchored, we shall drift, drift, drift away from, and, in nine cases out of ten, shall not feel that we are moving, till we are roused by hearing the noise of the whirlpools and the falls close ahead of us; and look round and see a strange country.

It is so easily done. Be too concerned with the things of the world and silently, oh so silently, the connection to the things of faith will be washed away, and church, Bible study, worship, quiet time … all will recede into the background and eventually out of sight.
I’ve seen this happen to people, and I’m sure you have too. The golf game, or the fancy home, or the social life, or stress, or temptation… It washes away the connection and the anchor slips. For me, I suppose, it could be work. There have been times when I have been so caught up with what I’ve been doing that I could have been set adrift. I’ve become very aware the risks, and watch for the symptoms.
It’s not just something we need to watch for in ourselves. We ought to remember that to be a Christian is to be in a war — and we’re not in it on our own. We have fellow soldiers, brothers and sisters, and we need to be watching their backs. We need to be looking out for the drifters. Who’s not in their usual place of service? Who’s not in Sunday school class? Who’s not in the worship service? If that’s one of our fellow soldiers being washed away, we owe them the duty expressed in another great passage from Hebrews:

And let us consider one another to provoke unto love and to good works: not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching. (Hebrews 10:24-25)

Don’t be a drifter … and don’t let anybody else drift away either.