Be sober, be vigilant; because your adversary the devil walks about like a roaring lion, seeking whom he may devour. -1 Peter 5:8

The whole world looks upon a Christian: he is the observed of all observers. In a Christian every fault is seen. A worldly man may commit a thousand faults, and nobody notices him; but let a Christian do so, and he will very soon have his faults published to the wide world…Don’t think the world is ever asleep. We say, “as sound asleep as a church,” and that is a very good proverb; but we cannot say, “as sound asleep as the world” for it never sleeps; it always has its eyes open and it is always watching us in all we do. The eyes of the world are upon you.

And there are darker and yet more malignant eyes that scowl upon us. There are spirits that people this air, who are under the prince of the power of the air, who watch every day for our halting…And alas! those spiritual creatures are not all good. There be those that are not yet chained and reserved in darkness, but who are permitted by God to wander through this world like roaring lions, seeking whom they may devour, ever ready to tempt us. And there is one at the head of them called Satan, the enemy, and you know his employment. He has access to the throne of God, and he makes most horrid use of it, for he accuses us day and night before the throne. The accuser of the brethren is not yet cast down-that is to be in the great day of the triumph of the Son of Man; but as Jesus stands as our Advocate before the throne, so does old Satan first watch us and tempt us, and then stands as our accuser before the bar of God. O my dear brothers and sisters, if you have entered into this race, and have commenced it, let these many eyes urge you forward. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0198.cfm