John Gill Reformed Baptist @doctorgill

And consulted that they might take Jesus by subtlety,.... The Jews had often attempted his life, but he escaped out of their hands; they had sent officers to apprehend him, but to no purpose; they therefore meet and consult together, to form some scheme, and make use of some stratagem, that they might lay hold on him, and keep him; they were for doing this...

Albert Barnes Presbyterian @notesbybarnes

Verse 4. By subtilty. By guile, deceit, or in some secret manner, so that the people would not know it. Jesus was regarded by the people as a distinguished prophet, and by most of them probably, as the Messiah; and the sanhedrim did not dare to take him away openly, lest the people should rise and rescue him.