1 There's no smoke without fire.

2 Zeal without knowledge is fire without light. Thomas Fuller 

3 Fire and water have no mercy. 

4 Water afar quencheth not fire.

5 There is no fire without smoke. 

6 Burnt child dreads the fire.

7 No smoke without some fire.

8 There is no smoke without fire. 

9 A burnt child dreads the fire. 

10 A match will set fire to a large building. 

11 He who plays with fire gets burned. 

12 Fire and water are good servants,[www.Sentencedict.com] but bad masters. 

13 Water afar quenches not fire.

14 The burnt child fears the fire. 

15 Fire is the test of gold, adversity of friendship. 

16 Fire that's closest kept burns most of all. 

17 Three removes are as bad as a fire. 

18 A little wind kindles, much puts out the fire. 

19 Fire proves gold, adversity proves men. 

20 A single spark can start a prairie fire. 

21 A little fire is quickly trodden out. 

22 A little spark kindles a great fire. 

23 Soft fire makes sweet malt.

24 Burnt bairns dread the fire.

25 Old use and wont legs about the fire. 

26 Better a little fire to warm us, than a great one to burn us. 

27 The fire is the test of gold; adversity of strong man. 

28 Fight fire with fire.

29 Labour to keep alive in your breast that spark of celestial fire, called conscience. 

30 Education is not the filling of a pail but the lighting of a fire.