Why so many "seemingly strong people" scramble in private, and have many times miserable lives, while projecting an image of public strength (see popular culture), is because their source of strength come from an inferior source, "themselves". They will be always inferior to the enemy, but the enemy will always be NOTHING in comparison to the Lord. That's why, you must submit your heart to the Lord. With the Lord, all what is good is possible. Again, "put on the full armor of God, so that you can take your stand against the devil’s schemes"