Repent one day before your death

Rabbi Eliezer would say: Repent one day before your death. (Pirkei Avot 2:10) He asked his disciples: Does a man know on which day he will die? Said he to them: So being the case, he should repent today, for perhaps tomorrow he will die; hence, all his days are passed in a state of repentance. Indeed, so said Solomon in his wisdom (Ecclesiastes 9:8): "At all times, your clothes should be white, and oil should not lack from your head' '' (Talmud, Shabbat
153a).

For more thoughts on teshuvah, repentance, from the prophet Haggai and from the teachings of Yeshua, check out David ben Avraham's article 'Tis the Season to Repent.