If you lose the passphrase you will lose access to your wallet and the coins in that wallet. CoinSpace has no way to recover a lost passphrase as this would create a security hole. Coinspace support will never ask you for your Passphrase. Because your passphrase can open your wallet without any additional security checks, it should be stored somewhere no one else has access. Whether it be digitally (using a program such as 1Password), or written and stored in a safe deposit box.
Its very important that when you create a new wallet you save this passphrase in a couple of secure places as you will lose access to the funds if you lose the passphrase