What did Paul care about most instead of material things and comfort?
Paul’s greatest concern was not material things or personal comfort but the salvation of lost people. All he wanted was lost people saved, and he was willing to adapt his approach—becoming as a Jew to Jews and as under the law to those under the law—so that he might gain them spiritually.
Les explains that Paul did not care about material things or comforts; his overriding aim was that lost people be saved. To reach different groups, Paul became as a Jew to the Jews and as under the law to those under the law, not to compromise but to awaken interest and gain them spiritually. Les notes this was not always easy, especially since Paul had preached against law, legalism, and temple worship, yet he took a Jewish vow and returned to the temple to fulfill it. His motive was to win his fellow Jews, including the more religious element of Judaism.
For though I be free from all men, yet have I made myself servant unto all, that I might gain the more.