reflect seriously on *oneself

have delusions / delusion / see things

have delusions / having delusions

suffering from delusion / suffer from delusion

indulge in wicked thoughts

hit hard / deal a hard blow / heavy blow / deal *someone a heavy blow / walloping / hard hitting / strike with a vigorous blow / wallop / hard blow / give a hard blow

hammer / blast / hit hard / give heavy hits / hit a hard grounder / swipe / hard hit / slug / hard hitting / wallop / heavy hit / swat / pump out hits

make a hasty conclusion / jump at a conclusion

chase / pursue / run after / give chase to