A famous quote from Hal Finney which is now part of the blockchain.

“Bitcoin seems to be a very promising idea. I like the idea of basing security on the assumption that the CPU power of honest participants outweighs that of the attacker. It is a very modern notion that exploits the power of the long tail.” – Hal Finney

Hal Finney was a well-known developer during Bitcoin’s earliest days and received the very first BTC transaction from Satoshi. Finney passed away on August 28, 2014.