First of all, the word of God takes precedence over our assumptions of good and evil. We read in Mark 10:18 - - there is none good but one, that is, God.
In the first part of 1 John Chapter 4 John is talking to brethren about false prophets; he is not saying a seemingly good person is of God, and then he proceeds to show the importance of love in us to have assurance in Verse 13, boldness in Verse 17, and casting off fear in Verse 18.
1 John 4:3 And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God:
1 John 4:15 Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God. There is no hint here that a person not born of God has God dwelling in them even if they feed the whole world.
Now let's look at someone that kept the whole law in Mark 10:20. -- Master, all these have I observed from my youth, but in Mark 10:21 Jesus tells him -- One thing thou lackest. Outside of being in Christ there will always be something lacking.
Can a person be saved without receiving Christ? Regardless of the kindness, good works, or love one shows without Christ, it is of no profit other than the amount of judgment they will receive when brought before the great white throne.
Outside of Christ all are judged in Romans 3:10: There is none righteous, no, not one. And Romans 3:23. All have sinned and fall short of the glory of God. We must be born of God.
In Jesus' name - larry2