Between two times
Ibn al-Qayyim said: Come and be with Allaah, and draw close to Him in an abode of peace, with no exhaustion or tiredness or suffering via the closest and easiest routes. You are in a time between two times, which in fact is your life, your current time, between the past and the future. What has passed can be set right by repentance and regret and prayers for forgiveness, and that is something which will not exhaust you or tire you out and is not difficult. Rather it is an action of the heart. As for the future, you should refrain from committing sin, and refraining from sin will give you a great deal of peace of mind. It is not a physical action that is too hard to do, rather it is resolve and firm intention, which will bring physical and mental peace.
But what matters is your life, which is your time between two times. If you waste it you will lose happiness and salvation. But if you take care of the present as well as correcting the past and the future as described above, then you will be saved and will have peace of mind, pleasure and tranquillity.
Taking care of it is more difficult than setting right that which comes before and after it, for taking care of it requires you to do that which is best and most beneficial for you, and which is most likely to bring happiness, and people differ greatly with regard to that.
Al-Fawaa'id (117).