Well the context is in the trying of our faith...not in the lust of the flesh... read Heb 4 in context
Heb 4:6 Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:
7 Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.
8 For if Jesus had given them rest, then would he not afterward have spoken of another day.
9 There remaineth therefore a rest to the people of God.
10 For he that is entered into his rest, he also hath ceased from his own works, as God did from his.
11 ¶ Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.
In context of Hebs 4 ....Jesus faith was tempted ...not some sin nature in Him