One characteristic of unbelievers is that they are unthankful. In spite of their attitude, God is kind to them.
2 Timothy 3:2: For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,
Luke 6:35b: . . . he (God) is kind unto the unthankful and to the evil.
They remain unthankful until they become believers. And the reality is, they have far less to be thankful for than believers. Believers have the blessings of God and eternal life to be thankful for.
When I received Jesus I was automatically thankful to Him. I wondered how that happened to me. Soon after I got saved I bought a Strong*s Concordance. I was thrilled when I found this definition of the word grace: The Divine influence upon the heart, including gratitude. That was what happened to me. God*s grace had made me thankful. He did it instantly when I received Jesus.
One characteristic of a saved person is gratitude to God. It is very rare that I hear someone pray and receive Jesus that they do not thank me for sharing the gospel with them. I have the privilege of sharing the gospel with a lot of individuals with major health problems. Those things are worth complaining about. But after receiving Jesus, the vast majority of them stop complaining. They seem to learn that heading for Hell was their biggest problem and now Jesus has solved it for them.
One of the main characteristics of the unthankful is that they complain. When people complain in our hearing, it is a cry for help. They are either unsaved or they are immature Christians. I hate it when I find myself complaining. It means that I am still an immature believer who has some more growing to do. It means that I have doubted again God*s promise that He is sufficient for me.
2 Corinthians 12:9b: . . . My grace is sufficient for thee: . . .
It means that I have forgotten again that He is all that I need and provides all I need.
Philippians 4:19: But my God shall supply all your need according to his riches in glory by Christ Jesus.
Hebrews 13:5b: . . . be content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee.