Often Matthew 25:41-46 is brought up when questioning Universal Salvation. But you must understand this:

God is everlasting FIRE

First, let's ask some questions to help explain.

We are told God is a consuming fire. Do you think God is physical fire?
Everyone will be salted with fire. Is this a horrific picture of physical fire raining on everyone?
In 1 Cor 3, we are told "the fire shall try every man's work"... is this physical...

Its very simple.

1. There are many verses that say God will have all people to be saved, God will reconcile all, God's judgments are for learning righteousness, all will be made righteous, death will be destroyed, God will do that which He says, it is good news - all nations will be blessed etc.

2. There are some other verses which say people/entities will be sent to eternal fire, everlasting punishment, judgment etc. There are also verses that say not everyone will...

KJV
Luke 12:10 And whosoever shall speak a word against the Son of man, it shall be forgiven him: but unto him that blasphemeth against the Holy Ghost it shall not be forgiven.

This sounds pretty dire. God will never forgive you for the sin of blasphemy?

Let's dig further. When we look in Matthew we see there is more information given:

KJV
Matt 12:31 Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men:...

Christian Universalism is preached throughout the scriptures. All of God's judgment, wrath, condemnation, fire are in harmony and unison with God's love - so much that it is Jesus'k one command for us, and those who do not love do not know God, because God IS LOVE. To know God is eternal (eonian) life, and to eternal (eonian) life is to love.

"If you declare with your mouth, Jesus is Lord, and believe in your heart that God raised him from the dead, you will be saved."...

Universal Salvation preached throughout Romans:

Romans 2:11 For God does not show favoritism.

Romans 3
22 This righteousness is given through faith in Jesus Christ to all who believe. There is no difference between Jew and Gentile, 23 for all have sinned and fall short of the glory of God, 24 and all are justified freely by his grace through the redemption that came by Christ Jesus.

Romans 5
6 You see, at just the right time, when we were...