What is a Believer?
In my opinion, a Believer is a person who believes that Yahuwshua (Jesus) was sent here by YaHuWaH (God) as His only begotten Son, was crucified, died, and was buried. He then rose from the dead on the third day, so our sins would be forgiven.
A Believer also has accepted Yahushua into their heart as their personal Savior and has asked for forgiveness of their sins. The word repent means "turn away", so not only do we ask for forgiveness of sins, but we turn away from them, and avoid them in the future. Then, from that point forward, a believer lives their life to glorify Him and follows His teachings.
We all stumble, and we all fall, but if you have the light of Yahuwshua in your heart, you know where you'll spend eternity!