How loss can be the apt sense of losing some sort of object

The speech should be based on the following.
How loss can be the apt sense of losing some sort of object, friend, family, reputation and we start grieving over it ( Include how loss is an inevitable part of life). And advice as to how the person can take this chance to move on with a fresh start.
Relate this speech to teenage life.
Include how loss gives you the opportunity to reflect on what is truly important so that you to keep moving forward.