Dying to the cross of Christ. Abandoning your life at the foot of it and walking away in newness of life to face the striving to sustain it; the fact of sin that will challenge you.
"Present your very selves a living sacrifice" is something different. The idea of that is that His will becomes our will, His desires becomes ours...we allow Him to LIVE in us.
This is all receiving not giving, this is all joy.