I agree with both of your previous posts that were posted for you above.
And if my expierince will help you out here it goes....
I have 3 cats. But 1 cat (a stray) kept coming over and looking for food. He was VERY scared of me at first.
I just placed a bowl of water and food out at about tthe same time everyday and he started coming by everyday. Its been about 6 months since he first started coming by and now when my door is open to the house... he runs in!!
He is so loving towards me and my girls now.
These strays just arent used to being loved by humans. Most of them are probably shoo-ed away and that causes them to not trust us.
He/She just needs to know that they can trust you. Do it slowly.
I started by walking to him slowly... but bent down low to the ground.... and when he would try to back away from me I would talk really sweet to him. I would tell him that I wasnt gonna hurt him. Most strays are used to people screaming at them so just the soft voice will be a nice change for him/her.
Try it and let me know how he/she reacts.
And thank you for being such a kind person to want to love this animal whether you decide to make it an inside cat or not.