It's not totally random anymore if your theory about the influence of the spirit is true.
.
Do you understand, seeds are used just to sign and to ensure the privacy of the communication between the client an the server,
Personally if I heard or read a word that grabs my attention, or if a word comes to my mind, I play it as client seed on freebitcoin.
But I lose every time or I win very little amounts...
Better for you try guessing the results of the rolls,
And believe me, it is not impossible.
Or put a finger on the RNG of the server
Anyway that's what the OP is about
No it doesn't work exactly like that.
In a provably fair game the outcome is a mathematical operation between the server seed (the value the house is playing) and the client seed(the value you are playing).
If you don't choose manually your (client) seed, your browser will put a random one and you won't see anything.
On freebitcoin for example, the outcome is computed like that (the nonce is just the number of your roll) :
Two strings are created :
STRING1 = "[NONCE]:[SERVER SEED]:[NONCE]"
STRING2 = "[NONCE]:[CLIENT SEED]:[NONCE]"
Then HMAC-SHA512 is used to hash STRING1 with STRING2 as the secret key, giving us a 128 character hex string.
The first 8 characters of the hex string are taken and converted to a decimal.
This decimal is then divided by 429496.7295 and rounded off to the nearest whole number.
This whole number is used as your roll, with the maximum possible value being 10,000.
Once you've played you can check it by doing the calculation yourself (you should also check if the hash of the server seed given before the roll is the right hash of the server seed given after the roll)
In short, manually choosing a client seed is like rolling the dices yourself, not choosing it is like letting a robot play for you...