Hey all, I have this file which contains a lot of messages in format like

[2/2/07 13:23:00] This is my message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Check This!
[2/2/07 13:23:10] This is my second message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!
[2/2/07 13:24:48] This is my third message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!

when I do "grep" on this file using "2/2/07 13:23", it returned

[2/2/07 13:23:00] This is my message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[2/2/07 13:23:10] This is my second message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

but in fact I want

[2/2/07 13:23:00] This is my message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Check This!
[2/2/07 13:23:10] This is my second message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!

since these messages span over several lines, could anyone tell me how to achieve what I need? Thank you so much!