Justification is by faith alone - without and apart from works!
Romans 4:5 But to him that worketh not, but believeth on him (Jesus) that justifieth the ungodly (us sinners), his faith (or trust) is counted for righteousness (or moral perfection). v6. Even as David also describeth the blessedness of the man, unto whom God imputeth (counts) righteousness without (or apart from) works,
The Bible is very clear in Romans chapter 4, and elsewhere in the New Testament (especially in the writings of Paul), that salvation is, and always has been, by faith alone apart from works.
The only way for imperfect man to become righteous and enter Heaven is by receiving the imputed righteousness (or sinless perfection) of Jesus Christ, given to faith, and not to works of the law.
Romans chapters 3 and 4, as well as James chapter 2 verse 10 all refute the ''Faith without works is dead'' misapplied scripture. If righteousness were by the law, then man would need to be perfectly sinless to enter Heaven, and not to sin a single time in all of his life for him to be qualified. But the scripture ''has concluded all under sin'', so that ''the promise (of righteousness) by faith of (in) Jesus Christ might be given to them that believe'' (Galatians 3:22). Thus according to scripture, it is impossible to be saved by the works of law, for we are all sinful and imperfect.
Thus the only way for man to be saved and enter Heaven is to be justified (or declared righteous) by faith in Jesus' finished work on the cross (that is to accept His death, burial and resurrection as complete payment for our sins). There is no other condition or requirement.
By grace alone, through faith alone, in Christ alone - To God be the Glory.