A scarcity view treats business as a fixed pie — anyone else's gain is your loss. An abundance view assumes the pie can grow, which changes what you are willing to do.
Scarcity produces zero-sum behaviour: reluctance to refer work, difficulty being pleased for competitors, hoarding information, negotiating every deal as though it were the last. It is not irrational — some markets really are fixed — but it becomes a default rather than an assessment.
Abundance assumes there is enough recognition, profit and opportunity to go round, and behaves accordingly: refers freely, shares what it knows, looks for the arrangement that works for both sides.
It shows up most visibly in referrals and in negotiation. Businesses that refer work they cannot do receive work back. Those that squeeze every supplier to the last penny find nobody goes out of their way for them when it matters.
This is Covey's fourth habit — think win-win — with the mindset that has to sit underneath it.