According to Osho, sadness persists not because life lacks comforts but because our philosophy is mistaken: we relate to life as a burden, devoid of love, and hold condemning beliefs (e.g., "family is sin"). Perspective creates weight; love makes the same load light. Responsibility is immediate; there is no past-life ledger. Reexamine your outlook, drop life-negating ideas, and let love infuse actions; joy arises instantly.
Sadness hangs around because we see life as a heavy load; if we bring love and change our beliefs, the same life feels light right now.