Deep down, there is a pulse.
A weak tremor of an adolescent heart. It loves profoundly and feels passionately. Dreams hopefully.
It may not be as fresh as it was once, but it endlessly and relentlessly aims to redeem itself.
Take your doubt and replace it with this.

Deep down, there is shelter.
An immortal ground for the comfort you seek to maintain. It hovers humbly and awaits patiently; remains unlocked when you're homesick. It invites you warmly and nourishes your hunger. Although tattered and tired, it remains standing storm after storm.
Take your doubt and replace it with this.

Deep down, there is a purpose.
It flutters when you smile and it consoles when you weep. It picks you up when your kicked and compensates when you're conquered. It's modest. It won't demand its presence and refuses to beg to be heard. It whispers. It listens. It knows its place and speaks when spoken to.
Deep down, its inside of you.
Take all your doubt and replace it with this.