We can "extend" our life by living it meaningfully now.

Since you can't extend your life on this earth, you can however "extend it" by spending your time wisely during the course of your life living on this earth. By not doing overtime in work you can then used that saved time in which you fought for, doing the things that is meaningful which you felt you will probably be doing during the last few days of your life. you do it early by bringing it back to the presence. So then every minutes fought for is every minute saved or "Extend"