“Obstacles cannot stop me; Each obstacle strengthens my determination even more!” Leonardo da Vinci By Özdeyiş.NetEndurance Promises, Words of Determination and Perseverance, Motivational Quotes, Picture Quotations0 comments ▶Dr. Tayfun Topaloğlu Youtube Instagram: @drtayfuntopaloglu “Obstacles cannot stop me; Each obstacle strengthens my determination even more!” Leonardo da Vinci