Revelation 2:5

5 Remember then from what heights you have fallen. Repent (change the inner man to meet God's will) and do the works you did previously [when first you knew the Lord], or else I will visit you and remove your lampstand from its place, unless you change your mind and repent. 

Notice that Jesus doesn’t encourage the leaders of the church of Ephesus with the Truth that the Holy Spirit would cause them to remember their first love. Or that He would Shepherd them back to green pastures, or that He was greater within them, then whatever was in the world. The Truth for the true believer is that Jesus never leaves or forsakes us, even when we are wrong, He will correct us.

But when we [fall short and] are judged by the Lord, we are disciplined and chastened, so that we may not [finally] be condemned [to eternal punishment along] with the world. 1 Corinthians 11:32. 

Our Father prophesied through Ezekiel that He would place His Spirit within us and cause us to walk in His statutes and keep His judgments, Ezekiel 36:27. But we don’t read here that Jesus spoke to the leaders of the church at Ephesus this way. Jesus told them to remember or they would lose their church! The Truth is that we can do nothing without Jesus, John 15:5, especially in correcting our bad behavior. Our Father knows full well how we are, so He did something about it, He empowered us with the fullness of Himself, to seal and keep us until the day of our redemption.

And do not grieve the Holy Spirit of God [do not offend or vex or sadden Him], by Whom you were sealed (marked, branded as God's own, secured) for the day of redemption (of final deliverance through Christ from evil and the consequences of sin). Ephesians 4:30

I do not ask that You will take them out of the world, but that You will keep and protect them from the evil one. John 17:15

I have made Your Name known to them and revealed Your character and Your very Self, and I will continue to make [You] known, that the love which You have bestowed upon Me may be in them [felt in their hearts] and that I [Myself] may be in them. John 17:26

Let your character or moral disposition be free from love of money [including greed, avarice, lust, and craving for earthly possessions] and be satisfied with your present [circumstances and with what you have]; for He [God] Himself has said, I will not in any way fail you nor give you up nor leave you without support. [I will] not, [I will] not, [I will] not in any degree leave you helpless nor forsake nor let [you] down (relax My hold on you)! [Assuredly not!] Hebrews 13:5