If God can keep us from sinning for a moment, He can keep us from sinning for a lifetime, since a lifetime is made up of contiguous moments.
If, by His grace, you can live one moment (second, minute) without deliberately disobeying God, you can live ten minutes, one hour, one day, one lifetime without deliberately disobeying God.
In fact, God says that He has given us His word so that we SIN NOT.
Psalms 19:13
(13) Keep back thy servant also from presumptuous sins; let them not have dominion over me: then shall I be upright, and I shall be innocent from the great transgression.
Psalms 119:11
(11) Thy word have I hid in mine heart, that I might not sin against thee.
Romans 6:11-14
(11) Likewise reckon ye also yourselves to be dead indeed unto sin, but alive unto God through Jesus Christ our Lord.
(12) Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof.
(13) Neither yield ye your members as instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God.
(14) For sin shall not have dominion over you: for ye are not under the law, but under grace.
Romans 6:16-20
(16) Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey; whether of sin unto death, or of obedience unto righteousness?
(17) But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.
(18) Being then made free from sin, ye became the servants of righteousness.
(19) I speak after the manner of men because of the infirmity of your flesh: for as ye have yielded your members servants to uncleanness and to iniquity unto iniquity; even so now yield your members servants to righteousness unto holiness.
(20) For when ye were the servants of sin, ye were free from righteousness.
Psalms 19:13
(13) Keep back thy servant also from presumptuous sins; let them not have dominion over me: then shall I be upright, and I shall be innocent from the great transgression.
Psalms 119:11
(11) Thy word have I hid in mine heart, that I might not sin against thee.
Romans 6:11-14
(11) Likewise reckon ye also yourselves to be dead indeed unto sin, but alive unto God through Jesus Christ our Lord.
(12) Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof.
(13) Neither yield ye your members as instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God.
(14) For sin shall not have dominion over you: for ye are not under the law, but under grace.
Romans 6:16-20
(16) Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey; whether of sin unto death, or of obedience unto righteousness?
(17) But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.
(18) Being then made free from sin, ye became the servants of righteousness.
(19) I speak after the manner of men because of the infirmity of your flesh: for as ye have yielded your members servants to uncleanness and to iniquity unto iniquity; even so now yield your members servants to righteousness unto holiness.
(20) For when ye were the servants of sin, ye were free from righteousness.
