Jn 5:39-40, Jn 6:40, Jn 17:3
Jesus visited Martha's house. At that time Martha was busy serving Jesus, and Mary listened to Jesus. Jesus said to her that Mary chose the good side. (Lk 10:38-42)
Lk 10:38 Now it came to pass, as they went, that he entered into a certain village: and a certain woman named Martha received him into her house. 39 And she had a sister called Mary, which also sat at Jesus' feet, and heard his word. 40 But Martha was cumbered about much serving, and came to him, and said, Lord, dost thou not care that my sister hath left me to serve alone? bid her therefore that she help me. 41 And Jesus answered and said unto her, Martha, Martha, thou art careful and troubled about many things: 42 But one thing is needful: and Mary hath chosen that good part, which shall not be taken away from her.
To know and believe that Jesus is the Christ is to receive eternal life. (Jn 5:39-40, Jn 6:40, Jn 17:3)
Jn 5:39 Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me. 40 And ye will not come to me, that ye might have life.
Jn 6:40 And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day.
Jn 17:3 And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.