“Wherefore the rather, brethren, give diligence to make your calling and election sure: for if ye do these things, ye shall never fall”
2 Peter 1:10

You’d subject yourself to needless battles of assurance of salvation if you don’t prove your calling.

Also, you will not have a real sense of progress in your walk with God until you overcome some habits.

Remember, God is not telling you to do something you can’t do. He is telling you to do something that he has already empowered you to do.

“I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service. And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God”
Rom 12:1-2

And just before you think it is impossible to do this, you’re reminded in Ephesians 5:8: “For ye were sometimes darkness, but now are ye light in the Lord: walk as children of light.”

It is because you are now ‘light in the Lord’ that you can ‘prove’ or function in God’s perfect will.

You have been called to function in agreement with God’s word concerning you. Exercise it in your life.

Paul writing to the church at Phillipi instructs them saying:

Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling.
Philippians 2:12

Paul isn’t telling them to work for their salvation but to work in accordance to what they’ve received.

He explains why in the next verse:

For it is God which worketh in you both to will and to do of his good pleasure.
Philippians 2:13

Sanctification is the will of God. Exercise yourself in that will!