Luke 18:18

The young man believed he could do something to earn eternal life, and he wanted to make sure he had not overlooked it (cf. Luke 10:25). John 3:3-15 shows that eternal life includes life in the messianic kingdom. To obtain eternal life meant to enter the kingdom (John 3:3-5). Luke and Mark both have him using the word "inherit" (Gr. kleronomeso) while Matthew wrote "obtain" (Gr. scho). This difference probably reflects Matthew’s use of the young man’s original word. Mark and Luke probably used the word "inherit" for their Gentile readers to clarify what was in the rich young ruler’s mind. He was talking about getting something that he as a Jew thought that he had a good chance of obtaining because of his ethnic relationship to Abraham.