'Careful' in the Bible

it has seemed right to me also, after careful investigation of the facts from their commencement, to write for you, most noble Theophilus, a connected account,

"And why look at the splinter in your brother's eye instead of giving careful attention to the beam in your own?

Be careful, therefore, how you hear; for whoever has anything, to him more shall be given, and whoever has nothing, even that which he thinks he has shall be taken away from him."