The waiting is the hardest part and also part of the test that we’re forced to go through.
First of all (and hopefully the obvious part if you’re not brand new to your own awakening)… Your twin knows on the soul level (5D stuff). Who wakes first was agreed pre-incarnation. So on some level, they already know. They just have a different part of the path to walk than you do right now.
No better or worse, no harder or easier.
The Divine feminine usually awakens first. While you’re in your dark night, he’s anchoring the vibration, like a boat in rough seas. Staggered awakenings are by design, so you don’t both crash.
You can’t wake them directly with reasoning or explaining.
Sending them a link to this forum, this thread or forwarding an Instagram video is unlikely to do it if they’re not ready to hear it yet. (But if you have been sent a link to this from your partner… hi! Welcome to the start of the wildest journey and the most amazing connection 
)
If you want to awaken your twin then the only way to do it is by doing your own mirror work.
It’s not about the right words to use or the right text message to send. Twins are mirrors. They share core energy. Your healing shifts the field you both vibe in. Get stable and high enough, and it draws them in.
Your goal isn’t to sit around and wait for them to suddenly turn around and understand everything (as nice as that would be). Your goal is to awaken yourself so much that you drag them kicking and screaming into the spiritual side of this incredibly journey.
Your work is helping him, even if it doesn’t show yet. Keep the shadow work and healing, for you.