Constantly

"Watch and pray, lest you enter into temptation. The spirit indeed is willing, but the flesh is weak.” Matthew 26.41

These are two things that must be constantly on our minds: watch and pray. They are as important to maintaining a clear conscience, and therefore salvation, as oxygen is  for life.
To watch is to always be careful not to be surprised by temptation, and to pray is to be constantly rebuking evil thoughts, doubts, fears and all evils.
It is better to always be on the watch than to fall.

Spirit of power

"For God has not given us a spirit of fear, but of power and of love and of a sound mind." 2 Timothy 1.7

Fear is a spirit that dwells in the minds of those who are distant from the Creator. However, this same spirit is empowering those who are possessed by it to do what is evil.
But the Spirit of God gives us power to overcome evil, love to love even our enemies and a sound mind, which means balance, not to be radical.

Remains

"But the anointing which you have received from Him abides in you, and you do not need that anyone teach you; but as the same anointing teaches you concerning all things, and is true, and is not a lie, and just as it has taught you, you will[a] abide in Him." 1 John 2:27

The Holy Spirit comes upon those who are sincere to be guided according to His will, so that they may not be taught by deceiving spirits. This is the anointing that teaches.