The Quran

Preface

أَلا لِلَّهِ الدّينُ الخالِصُ ۚ وَالَّذينَ اتَّخَذوا مِن دونِهِ أَولِياءَ ما نَعبُدُهُم إِلّا لِيُقَرِّبونا إِلَى اللَّهِ زُلفىٰ إِنَّ اللَّهَ يَحكُمُ بَينَهُم في ما هُم فيهِ يَختَلِفونَ ۗ إِنَّ اللَّهَ لا يَهدي مَن هُوَ كاذِبٌ كَفّارٌ

Yusuf Ali

Is it not to God¹ that sincere devotion is due? But those who take for protectors other than God (say): “We only serve them in order that they may bring us nearer² to God.” Truly God will judge between them in that wherein they differ.³ But God guides not such as are false and ungrateful.

In many Signs in Creation as described below, there yet is a clear indication of the unity of Plan, pointing to the Unity of the Creator. Worship of service is due to none but Him. And He wants exclusive and sincere devotion.
Worshippers of Idols or of deities other than God, e.g., saints or perhaps Wealth and Power, Science or Selfish Desire, may pretend that these are symbols that may get them nearer to their self-development, nearer to the goal of their life, nearer to God, but they are altogether on the wrong track.
This departure of theirs from true worship, this divergence from the right way, produces endless disputations and sects. God will judge between them. But if they are determined to go after falsehoods and forget the gratitude and service which they owe to God, and God alone, they are putting themselves on a Path where they will get no guidance. They are cutting themselves off from revealed Truth.