How is your relationship with GOD? What kind of signs are you looking for? The bible states that the greatest of faith according to Christ are those who see not, but still believe. But he also said: "Seek and ye shall find." So, if you're looking for GOD and ask for a sign that your search is acknowledged, or you have some serious personal matter that needs to be resolved, I'd say definitely yes, ask away, repeatedly. But are you ready to believe that sign when it's given is the better question. Often no sign is a sign that you need to think for yourself, and rely on the knowledge you already have. Just remember, GOD isn't a genie, bound to do anyone's beckoning, it's quite the opposite. We are to be at HIS beck, HIS call, to do HIS will, not ours, because only HE knows what's truly right or wrong. Maybe instead of us receiving a sign from him in times of need, it is we who need to do the showing. Signs tempt God and that's not a good thing to do. Signs preclude faith and Christianity is a faith walk. To ask for a sign shows lack of faith in God unless He is asking you to carry that jawbone toward that 1000 men, (of course if you heard God telling you take that jawbone you've better do it lol) but just to pay the rent.. forget it and especially forget it if the sign is to increase your faith, you'll be just as more likely to feel so left out in the cold for a uncertain span of time :0) God wouldn't even help my old cat die peacefully, instead the cat had a seizure on Saturday night! boy was I mad at God for ruining Sunday. :0) I might suggest that you ask God to put His love inside your heart, when He does it won't be a sign but it will truly be a blessing and its a faith booster the next time you feel you need a sign. Be blessed.