CONTINUE, persist; go on, jog on, keep on, run on, hold on; abide, keep, pursue, stick to; take -, maintain- its course; carry on, keep up, drag on, stick [colloq.], persevere, endure, carry on.
SUSTAIN, uphold, hold up, keep on foot; follow up, perpetuate, prolong, maintain; preserve [See ] harp upon (repeat) [See Repetition].
KEEP GOING, keep alive, keep the pot boiling [colloq.], keep up the ball [colloq.]; die in harness; plug at it or along [slang]; keep the field, keep the ball rolling, keep at it, keep up; hold on -, pursue -the even tenor of ones way.
LET BE; stare super antiquas vias [L.]; quieta non movere [L.]; let things take their course.